arm: mvebu: turris_omnia: Increase fdt size in fixup_mtd_partitions

Sometimes fixup_mtd_partitions() prints during booting kernel error
"Failed fixing SPI NOR partitions!" because it does not have enough space
for creating all paritions nodes. So increase fdt size.

Fixes: 92f36c8e74c1 ("arm: mvebu: turris_omnia: fixup MTD partitions in Linux' DTB")
Signed-off-by: Pali Rohár <pali@kernel.org>
Reviewed-by: Stefan Roese <sr@denx.de>
Reviewed-by: Marek Behún <kabel@kernel.org>
diff --git a/board/CZ.NIC/turris_omnia/turris_omnia.c b/board/CZ.NIC/turris_omnia/turris_omnia.c
index 796c55f..98bad11 100644
--- a/board/CZ.NIC/turris_omnia/turris_omnia.c
+++ b/board/CZ.NIC/turris_omnia/turris_omnia.c
@@ -979,6 +979,9 @@
 			return false;
 	}
 
+	if (fdt_increase_size(blob, 512) < 0)
+		return false;
+
 	parts = fdt_add_subnode(blob, offset, "partitions");
 	if (parts < 0)
 		return false;